Valve-resurfacing mechanism



R. E. LEES VALVE RESURFACING MECHANISM Oct. 19, 1926.

Fiied Nov. 24, 1925 Patented Oct. 19, 1926.

UNITED STATES ROBERT E. LEES, OF WILLTAMSBURG, PENNSYLVANIA.

VALVE-RESURFACING- IvTECHANISIvI.

Application filed November 24, 1925.

The present invention relates to mechanisms for resurfacing or polishingvalve seating surfaces. More specifically it relates to a mechanism tobe used in connection with valves of internal combustion engines whichhave a beveled seat or surface which is apt to become pitted or burned,necessitating more or less frequent surfacing.

An object of the present invention is the provision of a mechanismadapted to be mounted on a power-driven device, which mechanisms holdsthe valve and provides means for producing an accurate and true surfaceon the seating of the valve.

A further object is the provision of an ad justable mechanism forresurfacing valves of various diameters and sizes.

In the accompanying drawings which form a part of the presentspecification Figure 1 shows a sectional view of the mechanism mountedin place upon an electric drill;

Fig. 2 shows a top plan view of the same; and

Fig. 3 a view from the direction of the arrows 8-3 in Fig. 1.

The specific form of the invention illustrated includes a supportingmember or frame 1 which has at its outer end an orifice 2 into which aremovable bushing 3 fits, the same being held in position by means of aset screw and lock nut 4. A plurality of bushings adapted to fit varioussized valve stems are provided and the proper size may he thereforereadily selected and fastened in the orifice 2.

The supporting member 1, as Shown in Fig. 2, has a slot 5 cut in itsinner end, the inner end having a surface 1 to fit accurately upon thecylindrical surface of an electric drill 6. A clamping nut 7 co-operatesto tighten the split portion of the supporting member in position on theelectrical drill so that the bushing 3 is in axial alignment with thechuck 8 of the drill. A supporting arm 9 is provided at the front end ofthe supporting member to one side of and adjacent the bushing. Thissupporting arm carries a roller 10.

A second supporting arm 11 is also provided at the front end of thesupporting member. This arm is bifurcated at its outer end, the lowerbifurcation 12 having a threaded opening adapted to receive an adjustingscrew 13. The upper bifurcated Serial No. 71,147.

portion of the arm has a block 14 pivotally mounted thereon by means ofa pivot 15. The upper surface of the block 14 is located in the sameplane as the axis of the roller 10, the block and the roller providing aplane resting surface for a file or similar cutting or polishing tool16. The angle formed by this plane with respect to the axis of thebushing is the same as that commonly existent between the seatingportion of an internal combustion engine valve and its stein.

A spring 17 is provided between the outer end of the block 14. and thelower portion of the bifurcated arm 12 so that the inner end of theblock is biased toward the adjusting screw 13. It is therefore possibleby means of this adjusting screw to raise or lower the front end of theblock 14 which has its upper surface cam-shaped or curved, and tothereby raise or lower the file or tool 16 with respect to the axis ofthe valve to be operated upon without in any way altering its angularrelation. By this adjustable means difierent diametered valves mayeasily be accommodated.

In making use of the device, the supporting member 1 is clamped, bymeans of the clamping screw 7, in such a position upon an electricdrill, with the bushing orifice 2 in axial alignment with the chuck ofthe drill, the electric drill being held in a suitable base or vise 18.A proper size bushing for the valve to be operated upon is then selectedand locked in place by the set screw 1. as valve 19 is then inserted inthe bushing member and its stem is fixed in the chuck 8 of the drill,this manipulation being carried on through the openings or cutawayportions 20 formed in the sides of the supporting member 1. The drill isstarted and the valve is rapidly rotated by means of the drill chuck. Afile 16 is laid across the roller 10 and the block 14, the block havingbeen previously adjusted so that the file makes a very light contactwith the edge of the valve. The depth of cut on the surface of the valveis then regulated by means of the adjusting screw 13 and the resurfacingoperation carried out. For subsequently polishing the surface of thevalve, a stone, or block of wood covered with emery paper, may besubstituted for the file while the valve is rotating.

It is of course understood that various changes and modifications fromthe specific disclosure may be made within the scope of the appendedclaims.

What I claim is:

1. ln a valve resurfacing attachment, a supporting member, a valve guidelocated in one end oi said supporting member, a pair of tool supportscarried by said supporting member adjacent said valve guide, andpositioning and clamping means located at the other end of saidsupporting member for mounting the same on a powerdevice having arotatable chuck with said valve guide in axial ,alinement with saidchuck.

In a alve resurfacing attachment adapted tor use with a power devicehaving a rotatable chuck, the combination of a supporting member, avalve supporting bushing located in one .end of said supporting member,means for locking said bushing in place, a pair of tool supports carriedbysaid supporting member adjacent said bushing, and positioning andclamping means located at the other end of said sup porting member formounting the same on said power device with .said bushing in axmlalinement with said chuck.

3. In a valve resurfacing attachment adapted for use with a power devicehaving a rotatable chuck, the combination o1 a supporting member, avalve supporting bushing located in one end of said support,- ingmember, means for locking said bushing in place, a pair of tool supportscarried by said supporting member adjacent said bushing, meansforadjusting the plane of said ,tool supports with respect to the axisof said bushing, and positioning and clamping means located at the otherend of said supporting member for mounting the same on said power devicewith said bushing in axial alinement with said chuck.

4. In a valve resurfacing attachment adapted for use with a. powerdevice having a rotatable chuck, the combination of a supporting member,a valve supporting bushing located in one end of said supporting member,a pair of tool supports carried by said supporting member adjacent saidbushing, means tor adjusting the height of one of said. tool supportswith respect to the axis of said-bushing, and positioning and clampingmeans carried by the other end of said supporting member "for mountingthe same on said power device with said bushing in axial alinement withsaid chuck.

In a valve resurfacing attachment adapted for use with a power devicehaving a rotatable chuck, the combination of a supporting member, avalve supporting bushing located in one end of said supporting member, afixed tool support carried by said supporting member adj acent saidbushing, a second tool support carried by said supporting memberadjacent said bushing on the opposite side of the axis of said bushing"from said first tool supporting member, adjustable means carried bysaid second tool support, and positioning and clamping means located atthe other end of said supporting means and including a threaded memberfor mounting the same on said power device with said bushing in axialalinement with said chuck.

6. In a valve resurfacing attachment, the combination oi a supportingmember, means to support a valve-stem rotatably in said member, a pairof tool supports carried by said member and means to vary the plane ofsaid tool supports with respect to the axis of said valve stem..

7, In avalve resurfacing attachment, the combination of a supportingmember, means to support a valve-stem rotatably in said member, a pairof tool supports carried by said member and a cam adjustably mounted onone of said tool supports.

In testimony whereof, I have hereunto af- ROBERT E. LEES.

f xed my signature.

